G
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Archived from groups: microsoft.public.win98.gen_discussion (More info?)
I have recently been provided with a Dell GX200 which has two standard
serial ports (ie. COM1: and COM2: with the standard I/O and IRQ), for
the purpose of supporting various legacy applications.
However, I only get normal serial port behaviour in Safe Mode (from within
Windows) or in "Pure DOS" mode. In Normal Windows mode or even after
"Shutdown to MS-DOS" mode, the serial ports either don't work at all (eg. all
outputs are negative and/or all inputs read as active) or else communications
is quite unreliable, even at low baud rates such as 1200bps.
Yet, all the other W98SE computers around here work just fine, no problems
with running these legacy applications that expect BIOS level and/or hardware
level access to the serial ports.
So, what's going on here? The Safe Mode and Pure DOS behaviour indicates
the hardware is OK. The other PC's indicate that W98SE _should_ be OK. Yet
in this case W98SE in normal mode is doing something strange. It isn't
shutting
down the serial ports to conserve power because the serial output are still
driving the LED's of my mini-tester.
BTW, both serial ports exhibit this problem. All updates for W98SE are
installed
(except the games).
Joe.
I have recently been provided with a Dell GX200 which has two standard
serial ports (ie. COM1: and COM2: with the standard I/O and IRQ), for
the purpose of supporting various legacy applications.
However, I only get normal serial port behaviour in Safe Mode (from within
Windows) or in "Pure DOS" mode. In Normal Windows mode or even after
"Shutdown to MS-DOS" mode, the serial ports either don't work at all (eg. all
outputs are negative and/or all inputs read as active) or else communications
is quite unreliable, even at low baud rates such as 1200bps.
Yet, all the other W98SE computers around here work just fine, no problems
with running these legacy applications that expect BIOS level and/or hardware
level access to the serial ports.
So, what's going on here? The Safe Mode and Pure DOS behaviour indicates
the hardware is OK. The other PC's indicate that W98SE _should_ be OK. Yet
in this case W98SE in normal mode is doing something strange. It isn't
shutting
down the serial ports to conserve power because the serial output are still
driving the LED's of my mini-tester.
BTW, both serial ports exhibit this problem. All updates for W98SE are
installed
(except the games).
Joe.